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<h1 class="entry-title">:first-of-type Selector</h1>
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						所属分类：<span class="category"><a href="/category/selectors/">选择器</a> &gt; <a href="/category/selectors/child-filter-selectors/">子元素过滤</a></span>
<span class="pull-right">英文文档：<a href="https://api.jquery123.com/first-of-type-selector/" target="_blank">:first-of-type Selector</a></span>
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<article class="entry selector" id="first-of-type1"><h2 class="section-title"><span>first-of-type selector</span></h2>
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<p class="desc"><strong>描述: </strong>选择所有相同的元素名称的第一个兄弟元素。</p>
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<span class="version-details">添加的版本: <a href="/category/version/1.9/">1.9</a></span>jQuery( ":first-of-type" )</h4></li></ul>
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<p>
<code>:first-of-type</code> 选择器匹配元素，在文档树中，相同的父元素并且在其他相同的元素名称之前。</p>
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<section class="entry-examples" id="entry-examples"><header><h2 class="underline">例子:</h2></header><div class="entry-example" id="example-0">
<h4><span class="desc">在每一个匹配的div中查找第一个span，给它添加一个类。</span></h4>
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<pre><div class="container"><div class="line"><code><span class="doctype">&lt;!DOCTYPE html&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">html</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">&lt;<span class="title">style</span>&gt;</span><span class="css"></span></code></div></div><div class="container"><div class="line"><code><span class="tag">span</span><span class="class">.fot</span> <span class="rules">{ <span class="rule"><span class="attribute">color</span>:<span class="value"> red;</span></span> <span class="rule"><span class="attribute">font-size</span>:<span class="value"> <span class="number">120</span>%;</span></span> <span class="rule"><span class="attribute">font-style</span>:<span class="value"> italic;</span></span> <span class="rule">}</span></span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">&lt;/<span class="title">style</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">&lt;<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>&gt;</span><span class="javascript"></span><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">&lt;<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>    <span class="tag">&lt;<span class="title">span</span>&gt;</span>Corey,<span class="tag">&lt;/<span class="title">span</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>    <span class="tag">&lt;<span class="title">span</span>&gt;</span>Yehuda,<span class="tag">&lt;/<span class="title">span</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>    <span class="tag">&lt;<span class="title">span</span>&gt;</span>Adam,<span class="tag">&lt;/<span class="title">span</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>    <span class="tag">&lt;<span class="title">span</span>&gt;</span>Todd<span class="tag">&lt;/<span class="title">span</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">&lt;<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>    <span class="tag">&lt;<span class="title">b</span>&gt;</span>Nobody,<span class="tag">&lt;/<span class="title">b</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>    <span class="tag">&lt;<span class="title">span</span>&gt;</span>Jörn,<span class="tag">&lt;/<span class="title">span</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>    <span class="tag">&lt;<span class="title">span</span>&gt;</span>Scott,<span class="tag">&lt;/<span class="title">span</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>    <span class="tag">&lt;<span class="title">span</span>&gt;</span>Timo<span class="tag">&lt;/<span class="title">span</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">script</span>&gt;</span><span class="javascript"></span></code></div></div><div class="container"><div class="line"><code>$(<span class="string">"span:first-of-type"</span>).addClass(<span class="string">"fot"</span>);</code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">html</span>&gt;</span></code></div></div></pre>
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<h4>Demo:</h4>
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